docs: def resizeEvent(self, evt=None):
  
          w = self.width()
          h = self.height()
          '''
          if h<=360:
              h=360
              self.resize(w,h)
          if w<=640:
              w = 640
              self.resize(w, h)
          '''
  
          step = (w * 94 / 100) / 5
          foot = h * 3 / 48